Letton Lake Bk - source to conf R Wye Water Body Moderate ecological status
Get Letton Lake Bk - source to conf R Wye data Attributes Water Body ID GB109055037120 Water Body Type River Hydromorphological designation not designated artificial or heavily modified NGR SO3473847095 Catchment area 37.889 km2 Catchment area 3788.85 ha Length 4.796 km Surveillance Water Body No Classifications Classification Item 2019 2022 Ecological Moderate Moderate Biological quality elements Moderate Moderate Invertebrates Moderate Moderate Macrophytes and Phytobenthos Combined Moderate Moderate Macrophytes Sub Element Moderate Moderate Phytobenthos Sub Element Moderate Moderate Physico-chemical quality elements Moderate Moderate Acid Neutralising Capacity High High Ammonia (Phys-Chem) Good High Dissolved oxygen Bad High Phosphate Poor Moderate Temperature High High pH High High Hydromorphological Supporting Elements Supports good Supports good Hydrological Regime High High Morphology Supports good Supports good Specific pollutants High High Copper High High Zinc High High Chemical Fail Does not require assessment Priority hazardous substances Fail Does not require assessment Benzo(a)pyrene Good Cadmium and Its Compounds Good Dioxins and dioxin-like compounds Good Heptachlor and cis-Heptachlor epoxide Good Hexabromocyclododecane (HBCDD) Good Hexachlorobenzene Good Hexachlorobutadiene Good Mercury and Its Compounds Fail Perfluorooctane sulphonate (PFOS) Good Polybrominated diphenyl ethers (PBDE) Fail Priority substances Good Does not require assessment Chlorpyrifos Good Cypermethrin (Priority) Good Fluoranthene Good Lead and Its Compounds Good Nickel and Its Compounds Good Other Pollutants Does not require assessment Does not require assessment
Why do all water bodies have a chemical status of fail?
Investigations into classification status Classification Element Cycle Year Status Outcome Dissolved oxygen 2 2016 Bad
Reasons for not achieving good (RNAG) and reasons for deterioration (RFD) All reasons (RFDs and RNAGs) attributed to the classification elements in
this water body.
Reason Type SWMI Activity Category Classification Element More information RFD Physical modification Land use - arable Agriculture and rural land management Dissolved oxygen Details RFD Point source Unknown (pending investigation) Other Dissolved oxygen Details RNAG Physical modification Land use - arable Agriculture and rural land management Dissolved oxygen Details RNAG Natural Natural conditions - other No sector responsible Dissolved oxygen Details RFD High to Good deterioration, no action required (RFD only) Not applicable No sector responsible Ammonia (Phys-Chem) Details RNAG Flow Land drainage Other Macrophytes and Phytobenthos Combined Details RNAG Point source Unknown (pending investigation) Other Invertebrates Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Polybrominated diphenyl ethers (PBDE) Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Mercury and Its Compounds Details RNAG Point source Sewage discharge (intermittent) Domestic General Public Phosphate Details RNAG Point source Private Sewage Treatment No sector responsible Macrophytes and Phytobenthos Combined Details RNAG Diffuse source Poor nutrient management Agriculture and rural land management Phosphate Details RNAG Point source Farm/site infrastructure Agriculture and rural land management Phosphate Details
Reasons for not achieving good status by business sector The issues preventing waters reaching good status and the sectors
identified as contributing to them. The numbers in the table are
individual counts of the reasons for not achieving good status with a
confidence status of 'confirmed' and 'probable', where the latest
classification is less than good status. There may be more than one
reason in a single water body. Note, table does not include reasons for
deterioration.
Significant water management issue Physical modifications Pollution from waste water Pollution from towns, cities and transport Changes to the natural flow and level of water Invasive non-native species Pollution from rural areas Pollution from abandoned mines Agriculture and rural land management 0 0 0 0 0 2 0 Industry 0 0 0 0 0 0 0 Mining and quarrying 0 0 0 0 0 0 0 Navigation 0 0 0 0 0 0 0 Urban and transport 0 0 0 0 0 0 0 Water Industry 0 0 0 0 0 0 0 Local & central government 0 0 0 0 0 0 0 Domestic general public 0 1 0 0 0 0 0 Recreation 0 0 0 0 0 0 0 Waste treatment and disposal 0 0 0 0 0 0 0 Other 0 0 0 1 0 0 0 No sector responsible 0 0 0 0 0 0 0 Sector under investigation 0 0 0 0 0 0 0 Total 0 1 0 1 0 2 0
Objectives Classification Item Status Year Reasons Ecological Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Biological quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Invertebrates Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Macrophytes and Phytobenthos Combined Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Physico-chemical quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Acid Neutralising Capacity Good 2015 Ammonia (Phys-Chem) Good 2015 Dissolved oxygen Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Phosphate Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Temperature Good 2015 pH Good 2015 Hydromorphological Supporting Elements Supports good 2015 Hydrological Regime Supports good 2015 Supporting elements (Surface Water) Not assessed 2015 Specific pollutants High 2015 Copper High 2015 Zinc High 2015 Chemical Good 2063 Natural conditions: Chemical status recovery time Priority hazardous substances Good 2063 Natural conditions: Chemical status recovery time Benzo(a)pyrene Good 2015 Cadmium and Its Compounds Good 2015 Dioxins and dioxin-like compounds Good 2015 Heptachlor and cis-Heptachlor epoxide Good 2015 Hexabromocyclododecane (HBCDD) Good 2015 Hexachlorobenzene Good 2015 Hexachlorobutadiene Good 2015 Mercury and Its Compounds Good 2040 Natural conditions: Chemical status recovery time Perfluorooctane sulphonate (PFOS) Good 2015 Polybrominated diphenyl ethers (PBDE) Good 2063 Natural conditions: Chemical status recovery time Priority substances Good 2015 Chlorpyrifos Good 2015 Cypermethrin (Priority) Good 2015 Fluoranthene Good 2015 Lead and Its Compounds Good 2015 Nickel and Its Compounds Good 2015 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information River Wye UK0012642 Special Area of Conservation Natural England
Monitoring sites which have been used to classify this water body Shows which sites were used for classification for which years within
each cycle.
Monitoring Site Cycle 1 Cycle 2 Cycle 3 LETTON LAKES CONFL R. WYE 50200 2011, 2009, 2012, 2010, 2013, 2014 2015, 2016, 2013, 2014 160214 160214 2014 2013, 2015, 2014 NORTON WOOD LETTON LAKE BROOK H0000032 2022 45362 45362 2014, 2010, 2009 2016, 2013, 2014, 2015